A computational study of a directinjection (DI) engine intake system using KIVA-3V was conducted. The engine considered had two intake ports designed to generate a swirling motion of the intake charge in the cylinder. To investigate the effect of adding shrouds to the intake valves on swirl, two sets of intake valves were considered; the first set consisted of conventional valves, and the secon...

We study how a multisided platform’s decision to certify subset of its complementors affects those and ultimately the platform itself. Kiva, microfinance platform, introduced social performance badging program in December 2011. The appears have been beneficial Kiva—it led more borrowers, lenders, total funding, amount funding per lender. To better understand mechanisms behind this increase, we ...

Se exponen algunas reflexiones producto de los resultados del proyecto “Kiva Pedagógica”, surgido la participación maestros las redes Chisua (colectivo educadores colombianos) y Red Comunicación Popular maestros, sabedores sabedoras, líderes sociales en Latinoamérica)[1], durante procesos levantamiento cartográfico/social experiencias educativas territorio, explorando relación saberes ambiental...

SUMMARY This is the second part of the numerical investigation on a low emissions staged turbine combustor (STC) using a modified version of the KIVA-II code. The main focus of this study is the numerical analysis of the reacting fluid flow and heat transfer inside the quick-quench/lean-combustion (QQ/LC) zones. In the QQ zone, cool dilution air was injected into the hot mixture through eight 4...

The task of coordinating hundreds of mobile robots in one of Kiva System’s warehouses presents many challenging multiagent resource allocation problems. The resources include things like inventory, open orders, small shelving units, and the robots themselves. The types of resources can be classified by whether they are consumable, recycled, or scheduled. Further, the global optimization problem...

A numerical study of airflow and spray transport from rotary cup atomizer using KIVA-3V is carried out. The numerical result show that the electrostatic field speed up spray droplet speed and improve transfer efficiency. Breakup model produces smaller drops which are entrained into the center recirculation zone. The results of a parametric study considering different cup rotational speed, shapi...

BACKGROUND Minimally invasive vertebral augmentation procedures are widely used to treat vertebral compression fractures although procedural polymethylmethacrylate cement leakage remains common. We report herein our initial experience with a novel vertebral augmentation technique designed to treat symptomatic vertebral osteoporotic fractures and osteolytic metastases with minimal cement extrava...